Monarch Mountain is one of the principal summits of the Pacific Ranges subdivision of the Coast Mountains in southern British Columbia. It stands just east of a pass between the Klinaklini River and the south branch of the Atnarko River, which is a tributary of the Bella Coola River. Surrounding Monarch Mountain is the Monarch Icefield, the northernmost of the major icefields of the Pacific Ranges, and just south of it is the Ha-Iltzuk Icefield, which is the largest.